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Commit a48f1fff authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Greg Kroah-Hartman
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nvmem: mtk-efuse: fix different address space warnings of sparse 



Fix the following sparse warnings:

drivers/nvmem/mtk-efuse.c:24:30: warning: incorrect type in initializer (different address spaces)
drivers/nvmem/mtk-efuse.c:24:30:    expected void [noderef] <asn:2>*base
drivers/nvmem/mtk-efuse.c:24:30:    got void *context
drivers/nvmem/mtk-efuse.c:37:30: warning: incorrect type in initializer (different address spaces)
drivers/nvmem/mtk-efuse.c:37:30:    expected void [noderef] <asn:2>*base
drivers/nvmem/mtk-efuse.c:37:30:    got void *context
drivers/nvmem/mtk-efuse.c:69:23: warning: incorrect type in assignment (different address spaces)
drivers/nvmem/mtk-efuse.c:69:23:    expected void *priv
drivers/nvmem/mtk-efuse.c:69:23:    got void [noderef] <asn:2>*[assigned] base

The type of nvmem_config->priv is (void *), so sparse complains
about assignment of the base address with (void __iomem *) type.

Even if we cast it out, sparse still warns:
warning: cast removes address space of expression

Of course, we can shut up the sparse by marking __force, but a more
correct way is to put the base address into driver private data.

Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4dd5f60e

drivers/nvmem/mtk-efuse.c

+17 −9
Original line number Diff line number Diff line
@@ -18,15 +18,19 @@ 
#include <linux/nvmem-provider.h>

#include <linux/platform_device.h>



struct mtk_efuse_priv {

	void __iomem *base;

};



static int mtk_reg_read(void *context,

			unsigned int reg, void *_val, size_t bytes)

{

	void __iomem *base = context;

	struct mtk_efuse_priv *priv = context;

	u32 *val = _val;

	int i = 0, words = bytes / 4;



	while (words--)

		*val++ = readl(base + reg + (i++ * 4));

		*val++ = readl(priv->base + reg + (i++ * 4));



	return 0;

}
@@ -34,12 +38,12 @@ static int mtk_reg_read(void *context, 
static int mtk_reg_write(void *context,

			 unsigned int reg, void *_val, size_t bytes)

{

	void __iomem *base = context;

	struct mtk_efuse_priv *priv = context;

	u32 *val = _val;

	int i = 0, words = bytes / 4;



	while (words--)

		writel(*val++, base + reg + (i++ * 4));

		writel(*val++, priv->base + reg + (i++ * 4));



	return 0;

}
@@ -50,19 +54,23 @@ static int mtk_efuse_probe(struct platform_device *pdev) 
	struct resource *res;

	struct nvmem_device *nvmem;

	struct nvmem_config econfig = {};

	void __iomem *base;

	struct mtk_efuse_priv *priv;



	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	base = devm_ioremap_resource(dev, res);

	if (IS_ERR(base))

		return PTR_ERR(base);

	priv->base = devm_ioremap_resource(dev, res);

	if (IS_ERR(priv->base))

		return PTR_ERR(priv->base);



	econfig.stride = 4;

	econfig.word_size = 4;

	econfig.reg_read = mtk_reg_read;

	econfig.reg_write = mtk_reg_write;

	econfig.size = resource_size(res);

	econfig.priv = base;

	econfig.priv = priv;

	econfig.dev = dev;

	econfig.owner = THIS_MODULE;

	nvmem = nvmem_register(&econfig);